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MINE ENGINEERING CIVIL ENGINEERING <br />MINE RECLAMATION CONST. MANAGEMENT <br />August 24, 2012 <br />Zach Trujillo <br />Division of Reclamation, Mining and Safety <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re: New Elk Mine Permit C- 1981 -012 <br />Technical Revision Application No. 66, Adequacy Response #2 <br />Haul Road to Refuse Disposal Area (RDA), Change designation of an access road to a haul road, <br />revise DWDA #2 design, Add Employee Parking lot and other miscellaneous drainage revisions <br />Dear Mr. Trujillo: <br />Items 1 - 5: Response is sufficient. <br />J. E. STOVER & ASSOCIATES, INC. <br />2352 NORTH 7 STREET, UNIT B <br />GRAND JUNCTION, COLORADO 81501 <br />PHONE: (970) 245 -4101, FAX 242 -7908 <br />On behalf of New Elk Coal Company (NECC), the following responses have been prepared in reply to the <br />Division of Reclamation, Mining and Safety (DRMS') comments and concerns regarding the above <br />referenced technical revision application stated in the letter dated August 13, 2012. <br />6. DRMS: In the SedCad model, flow into Culvert 81 should be for the 100 -year runoff rather than the <br />10 -year runoff, and Table 21 should reflect this with a reference to note #7. Please update the SEDCAD <br />model and Table 21. <br />NECC: The SedCad model for Culvert 81 was updated with Adequacy response #1 and is shown on <br />page EXH. 19(24) -26. Please see revised Table 21. <br />Item 7: Response is sufficient. <br />8. DRMS: Please submit a revised page 2.05 -11 and 2.05 -1la (Table 20) and pages 2.05 -14 and 2.05 - <br />14a (Table 21) to incorporate changes from TR -65. <br />NECC: Please see revised Tables 20 and 21. <br />9. DRMS: Please submit revised page 2.05 -44 to incorporate changes from TR -65. <br />NECC: Please see revised page 2.05 -44. <br />Please contact me if you have questions. <br />Sincerely, <br />° "t- 14- <br />Tamme Bishop, P.E. <br />Project Engineer <br />cc: Ron Thompson, NECC <br />Mike Trujillo, CDOW <br />Attachments: <br />TR -66, Pages 2.05 -11 & 11a (Table 20), revised 8 -24 -12 <br />TR -66, Pages 2.05 -14 & 14a (Table 21), revised 8 -24 -12 <br />TR -66, Page 2.05 -44, revised 8 -24 -12 <br />